Graphics.Blit not aligning content in VR?

Hey, I have this on a camera to blend two RenderTextures together using adaptive blending.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class AdativeCamera : MonoBehaviour {
6.     public Material addativeMat;
7.     public RenderTexture contentRT;
8.     void OnRenderImage(RenderTexture source, RenderTexture destination)
9.     {
10.         Graphics.Blit(source, destination);
11.         Graphics.Blit(contentRT, destination, addativeMat);
12.        
13.     }
14.  
15. }
16.  

The shader looks like this.

Code (CSharp):

1. Shader "blend" {
2.     Properties{
3.         _MainTex("Texture to blend", 2D) = "black" {}
4.     }
5.         SubShader{
6.             Tags { "Queue" = "Transparent" }
7.             Pass {
8.                 Blend One One
9.                 SetTexture[_MainTex] { combine texture }
10.             }
11.  
12.     }
13. }

This all works as intended outside of VR but when I use it in a VR setup, the Blit appears to render only one eye even if the camera is set to both. As a result, the "content" appears double as the 2 eyes do not align.

Any idea what direction I should go to resolve the issue? Thank you.